Method for restarting the reproduction of a tape cassette at the beginning of the music piece being played after a power turn-off and subsequent power turn-on of the cassette player

Abstract: The method for determining a reproduction position of a disc player in a reproduction device which reproduces information recorded on a recording medium through movement of a reproduction unit, includes a first step for identifying a piece number of music which was being reproduced of the time of power off and a position of a reproduction unit at the time of power off when power is turned on after turned off during reproduction of the piece of music recorded on a recording medium, and a second step for moving the reproduction unit to a beginning position of the piece of music which was being reproduced at the time of power off and performing normal reproduction, and the method for determining reproduction position of a record player in a reproduction device having a reproduction unit fixed and a recording medium moving for reproducing information recorded thereon, includes a first step for, when during the reproduction of a music recorded on a recording medium power is turned off and then turned on, detecting existence of information of music from a part the reproduction unit is happened to match with at the time of turn on of pieces of music recorded on a recording medium, and a second step for finding non-existence of signal of music from the part the reproduction unit is happened to match with the recording medium at the time of turn-on and performing reproduction from the beginning of the piece of music having been reproduced at the time of turn-off.

Description: FIELD OF THE INVENTION This invention relates to an audio device, more particularly to a method for determining reproduction position of a reproduction device such as a record player or a cassette player for an automobile, with which an audio device can be started reproduction from the beginning of a piece of music through detection of the beginning of the piece of music interrupted at the time of power off of the device, in case when the device is started during driving of the automobile after power off of the device at the time of stopping of operation of the automobile. BACKGROUND OF THE INVENTION Shown in FIG.1 is a block diagram of a conventional record player, based on which a conventional art is to be explained hereinafter. A conventional record player has a manipulation part 1 for selecting keys necessary to listen to a piece of music, a microprocessor 2, a memory part 3, a loading mechanism part 4 and a circuit part 5. The microprocessor 2 controls, during power is turned on, overall operation of a record player, such as processing key signals received from the manipulation part 1, and controlling of record loading and driving a reproduction unit in response to the processed signals, or controlling the number of revolutions of a disc etc., and detects the positions of the piece of music of which reproduction was interrupted and reproduction unit at the time of turn-off when power is turn-off during operation of the record player, and transmits the information. The memory part 3 has memory elements 3a such as non-volatile memory elements or memory elements using backup power, connected to the microprocessor 2, for storing position information of the reproduction unit and piece number of the music at the time of interruption of reproduction sensed by the microprocessor 2 when power is turned-off. The loading mechanism part 4 has a record sensing switch SW1, a turntable(not shown) and a reproduction unit(not shown), recieves driving signals from the microprocessor 2 and rotates a record disc in response to the driving signals to reproduce the piece of music recorded on the disc. The circuit part 5 connected to the microprocessor 2 and loading mechanism part 4, respectively and applies power thereon. The conventional record player having foregoing circuit can reproduce pieces of music recorded on a record disc by putting in power to the record player causing to load a record disc on the loading mechanism part 4 and subsequent turn-on of the record sensing switch SW1, rotation of the record disc, and operation of the reproduction unit. In this instant, the microprocessor 2 detects positions of the piece of music reproduced from a record disc by the reproduction unit and the reproduction unit, transmits the detected positions to the memory part 3, and stores the information about the positions of the pieces of music reproduced and reproduction unit into the memory part 3 at the memory elements 3a thereof. And, of the blocks, the circuit part 5 applies power to the microprocessor 2 and to the loading mechanism part 4, serving the device process input signals and generate sound. When a user cuts off power during operation of the record player, the microprocessor 2 senses it, and transmits information on the position of the piece number of the music and reproduction unit at the time of interruption of reproduction. Accordingly, the memory part 3 stores the information on positions of the piece number of music and reproduction into the memory elements 3a. When the user turns on record player again to listen to the music, the microprocessor reads in information on the positions of the piece of music and reproduction unit at the time of interruption of record reproduction, stored in the memory part 3 at memory element 3a thereof, and the loading mechanism part 4 starts to reproduce the piece of music from the position where reproduction of record has been interrupted. That is, the piece of music can be started reproduction from the position where reproduction has been interrupted at re-starting of the record player by having the microprocessor 2 detect the position of the reproduction unit and piece number of the music at the time of turning-off of the record player and storing information on the detected positions of the reproduction unit and piece number of the music into the memory part 3. Thus, upon turning-on again after turning-off, a conventional record player start to reproduce either from the first piece of music of the pieces of music recorded on the disc loaded on the record player, or, as has been explained, from the part of the piece of music interrupted at the time of turn off. Therefore, a user who happens listen to music for short interval, repeatedly, especially a user of a reproduction device of an automobile has experienced of inconveniences that the user happens to listen to either pieces of music recorded on the front part of the disc frequently, or from the middle of the piece of music having been reproduced at the time of turn-off, of the many piece of recorded music. And the user also has experienced inconveniences of manipulating the keys in the manipulating part, again to change to track for listening to the pieces of music either recorded on the aft pard of the disc or interrupted at the time of turn-off from the beginning. From DE-A-3 708 053 is known a compact disc player which, when after a power turn-off during play the power is turned on again, does not resume playing from the position played immediately before the power turn-off, but moves the optical pick-up to the beginning position of the music piece just being played. SUMMARY OF THE INVENTION The object of this invention for solving the foregoing problems is to provide a method for determining reproduction position of a reproduction device which can reproduce a piece of music from the beginnig thereof, which was being produced from a recording medium at the time of turn-off, when power is turned on after turn-off. These and other objects and features of this invention can be achieved by providing a reproduction device having a reproduction unit fixed and a recording medium moving for reproducing information recorded thereon, with a method according to appending claim 1. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of a conventional record player. FIG.2 is a block diagram of a record player such as a cassette player, in accordance with an embodiment of this invention. FIG.3 is a flow chart of the record player of FIG.2. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Shown in FIG.2 is a block diagram of a record player having a fixed reproduction unit such as a cassette player, in accordance with an embodiment of this invention. The record player in accordance with the embodiment of this invention has, a fixed reproduction unit and a moving recording medium, wherein the recording medium is, while moving, reproduced of information recorded thereon by the reproduction unit. The record player in accordance with this embodiment has a power switch part 101, a manipulation part 102, a microprocessor 103, a deck control part 104, a logic deck 105 and an indication part 106. The power switch part 101 has a switch SW3 for switching power for the record player. The manipulation part 102 has keys for applying signals for controlling operation of the device as the user wishs. The microprocessor 103 receives key signals from the manipulation part, processing the key signals, controls overall operation of the device, and senses the piece number and reproduction period of time of music reproduced from the recording medium and the position of reproduction unit. The deck control part 104 recieves control signals from the microprocessor 103, and controls a deck in response to the control signals. The logic deck 106 has the reproduction unit 105a, and reproduces information recorded on a recording medium 105b in response to the control signals of the deck control part 104. The indication part 106 recieves a piece number and reproduction period of time of music being reproduced from the recording medium sensed by the microprocessor 103, and displays them. The method for determining reproduction position of the record player includes a first step for detecting existence of information on a piece of music at a part the reproduction unit meets with the recording medium at the time of power on of the pieces of music recorded on the recording medium after power has been turned on and the recording medium has been loaded, and a second step for searching the recording medium for a part having no music signals and performing reproduction of the piece of music from the beginning. Operation of determining the reproduction position of the record player is explained hereinafter, referring to FIGs.2 and 3. In reproduction devices reproducing information each with a fixed reproduction unit 105b and a moving recording medium, there are tape record players. digital compact cassettes and digital audio tape record players. When the recording medium 105b is loaded into a deck part 106, power is turned on and information recorded on the recording medium is reproduced such record players are used to start reproduction from the middle of a piece of music in most cases, because they start reproduction of a piece of music from a part at whith a reproduction unit 105a and a recording medium are met of pieces of music recorded on a recording medium up to now. In order to prevent this problem, the embodiment of this invention is provided to, when the recording medium is loaded into a logic deck part 105, and power is turned on, reproduce the piece of music being reproduce at the time of power off from the beginning through detecting existence of information on the pieces of music from a part at which the reproduction unit meets with the recording medium as shown in FIG.3. First, when the recording medium is loaded into the logic deck part 105 and power is turned on, detection operation for existence of information is performed. In this instant, the information detection operation is carried out at fast forward FF operation and rewinding REW operation, wherein, in case of auto-reverse, the information detection of a piece of music recorded on the front surface is performed at rewinding REW operation and the information detection on the back surface is performed at fast forwarding FF operation. Once the deck control part 104 detects information recorded on a part at which the reproduction unit meets with the recording medium using an information detection circuit thereof, a rewinding operation is carried out. First, the rewinding operation is performed until a part having no recorded information is found. When a part having no information (between pieces of music) is detected using the information detection circuit thereof, the rewinding operation is stopped and a normal reproduction operation is performed, reproducing the piece of music being reproduced at the time of power off from the beginning, again. The foregoing embodiment of this invention can be applicable to all of the recording mediums, such as tape DAT, DCC etc., and allows to reproduce information recorded on a recording medium form the beginning of a piece of music interrupted of reproduction at the time of power off, when the power switch is turned on again after turn off. Thus, the foregoing method for determining reproduction position in accordance with this invention has advantage of allowing a user to listen to the piece of music having listened to from the beginning without any additional manipulation because the piece of music having been reproduced can be reproduced not from the middle of the piece of music as in conventional art, but from the beginning of the piece of music in case a user turns on an audio device again after turn off in the middle of the piece of music the user listened to under the circumstances. Although the invention has been described in conjunction with a specific embodiment, it is evident that many alternatives and variations will be apparent to those skilled in the art in light of the foregiong description.

Claims: A method for detecting the reproduction position of a cassette player having a fixed reproduction unit and a moving recording medium for reproducing music information recorded thereon, wherein the music information includes a plurality of pieces of music, the method comprising the steps of : detecting, when the reproduction of music recorded on the recording medium is turned off and then turned on, whether music information exists on the recording medium at the point where the fixed reproduction unit was reproducing at the time of turn off; searching the recording medium in the rewind direction to locate a non-music information portion that exists between an end of a previous musical piece and a beginning of the actual musical piece if the detecting step determines that music information exists on the recording medium at the point of turn off ; and restarting reproduction from the beginning of the piece of music being reproduced at the time of turn off by starting reproduction from the located portion. The method as claimed in claim 1, wherein the step of detecting existence of music information in the first step is carried out in the fast forward direction. The method as claimed in claim 1, wherein the step of detecting existence of music information in the first step is carried out in the rewind direction.

Inventors: KIM SANG YOUL, LEE CHUNG KU, KIM, SANG YOUL, LEE, CHUNG KU, KIM, SANG YOUL, DONGSHIN YEONRIP A-201
Applicants: LG ELECTRONICS INC, LG ELECTRONICS INC.
Application year: 1994
Main classification: G11B27
IPC codes: G11B15, G11B21, G11B27, G11B19